Temperature Controller - Staveb AG

Parameter Adjustments and Application Considerations 4-7EXAMPLEIn this example, we use the non-contact (infrared) sensortype K thermocouple 0…260°C specification. Therefore,this is a 2-point shift.YL and YH in equations 1 and 2 are set temperature lowerlimit (YL = 0°C) and set temperature upper limit (YH =260°C). Check the temperature of the control target.When the room temperature (X1) is 25°C, the readout onthe controller (Y1) is 40°C, and when the temperature nearthe set point (X2) is 110°C, the readout on the controller(Y2) becomes 105°C.Lower-limit temperature input shift value:Adjustment function groupLower-limittemperatureinput shift valuecnsl =0 – 40------------------- × {( 110 – 105) – ( 25 – 40)} + ( 25 – 40)=105 – 40–27.3°CUpper-limit temperature input shift value:Upper-limittemperatureinput shift valuecnsh =260 – 40------------------- × {( 110 – 105) – ( 25 – 40)} + ( 25 – 40)=105 – 40–52.7°CAlarm Functions/ParametersAlarm HysteresisYou can configure/program how much deviation (hysteresis) is allowed fromthe alarm value before the alarm comes on and resets.The hysteresis of alarm outputs, or when alarms are actually switchedON/OFF can be set as follows:Publication 900-UM003C-EN-E - January 2004